I spoke to support and they said i could order a new sim card online. I went to the page for this and it says to visit here - Contact Us - if you're already a customer. it is a generic contact page and this support forum was one of the options.
Can someone send a new sim card for the second line on my account? Send it to the address I have registered with this account (don't want to divulge personal details on a public forum).
I consent to the $25 charge
No one from Tmobile on this forum has access to account information.
As mentioned above, we don't have the account access needed to order that SIM card for you. You're welcome to use the options on the Contact us page to reach out to our Team of Experts or T-Force folks to have the SIM card order. You can also head to one of our retail stores and pick one up there if that's more convenient.
Manage your T-Mobile account